CBSE Class 10 Maths (Standard) 2025 · Paper 30/2/1 · Question 31

Arithmetic Progressions 3 marks Easy

A sum of Rs.

2, 000

is invested at

7%

per annum simple interest. Calculate the interests at the end of

1^{st}, 2^{nd}

and

3^{rd}

year. Do these interests form an AP? If so, find the interest at the end of the

2 7^{th}

year.

Answer

The interests at the end of the 1st, 2nd and 3rd years are ₹140, ₹280 and ₹420; they form an AP with

a = 140

and

d = 140

, and the interest at the end of the 27th year is ₹3780.

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